Hi
I added some streams in my area.
I'm disapointed to see that opencyclemap renders it too thin than is almost imposible to notice they are there. are even thinner than the elevation lines showed in opencyclemap.
however in openstreet they are rendered fine.

is there any way to notify someone to take a look at this.
thanks
regards

From your recent edits I see Riera de Cabrils is an example of your problem. In this case, it looks like changing it from waterway=stream to waterway=river was reasonable. OpenCycleMap will render it much wider with waterway=river; you just need to wait a few days for OpenCycleMap to be updated.

For narrower streams, which need waterway=stream, that's just how the OpenCycleMap developer decided to render them. You can try filing a request to see whether he feels like changing it.